Well-pump.



C. 0. 6v P. E. SPRAGUE.

WELL PUMP.

APPLICATION FILED JAN.6,1911.

Patented Oct. 31, 1911.

gne/5565 f COLUMBIA PLANODRAPH CU..WASHINGTON. D. c.

UNITED sTATEs PATENT oEErcE.

CHARLES O. SPRAGUE AND FRANK E. SPRAGUE, OF BAKERSFIELD, CALIFORNIA.

Patented Oct. 31, 1911.

Serial No. 601,173.

WELL-PUMP.

1,007,152. Specification of Letters Patent.

Application filed January 6, 1911.

To all whom it may concern:

Be it known that we, CHARLES O. SPRAGU'E,

and FRANK E. SPRAGUE, citizens of the United States, residing at Bakersfield, in the county of Kern and State of California, have jointly invent-ed new and useful Improvements in Well-Pumps, of which the following is a specification.

This invention relates to well pumps, and more particularly to pumps for Wells suitable and adapted for the extraction and elevation of hydro-carbon oils of both high and low gravity, in the recovery of which and the elevation and conduction of which to the surface of the earth a string of well tubing is employed, the same being lowered within the well casing in the well-understood manner.

The invention has for its object to provide improvements in well pumps which will be superior in point of relative sim-v plicity and inexpensiveness of construction, positiveness of operation, and facility of installation and assemblage and repair, and proper maintenance of working conditions, and which will be generally superior in elliciency and serviceability.

With the above and other objects in view, the invention consists in the novel provision, formation, construction, combination, association and relative arrangement of part-s, members and features, all as hereinafter described, shown in the drawing and finally pointed out in claims.

In the drawing -Figure 1 is a' vertical transverse sectional view-of features of-well pump construction and organization embodying the invention, parts being shown in full lines for clearness of illustration; Fig. 2 is a transverse sectional View, taken upon the line A-A, Fig. 1, and looking in the direction of the appended arrows; and, Fig. 3 is a transverse sectional view taken upon the line B-B, Fig. 1, and looking in the direction of the appended arrows.

Corresponding parts in all the figures are designated by the saine reference characters.

Referring with particularity to the drawing, C, D and E designate lengths or sections of pump tubing, which in practice are detachably united by unions or collars F and G respectively, which have threaded connection therewith.

H designates a plunger member which is illustrated as operating in the customary manner within pump tubing section D, such plunger member being of any preferred and suitable type and being provided with a pump rod K which extends upwardly to suitable means for actuating the plunger member therethrough.

L designates a so-called liner or interior shell or lining disposed within the pump ltubing section D, and in contact with the inner surface portion of which the plunger member K reciprocates in operation. The said liner is inthe major portion thereof cylindrical in formation, is disposed concentrically with and within said tubing section D, and is separated therefrom by an annular space CZ, whereby the major portion of said liner is free to float or yield structurally and laterally within the tubing section D, being formed of such material, as of metal having an inherent'quality, that it is capable of flexion or a slight buckling movement. The lower end portion of the liner L flares laterally or is increasingly thickened, as at 'Z merging into a terminal exterior flange n which abuts against the lower end portion of the section D. The flaring portion Z is interrupted by a longitudinal annular surface portion n which is concentric with the longitudinal axis of the liner L, and has close superficial contact with the lower inner superficial portion of the tubing section D, as at o, whereby the liner is definitely centered within the section D, in concentric relation. The union G is provided with holding means M for `maintaining the flange n up against the lower end portion of the tubular section D, such means consisting of an annular internal flange p formed upon the union Gr, and of slightly greater internal diameter than the liner L. When the union 'G is screwed onto the lower end of the section D, the flange p lis brought to bear positively upon the lower endportion and flange n of the liner L, locking the same positively in position within the section D, in vertical extension.

When it is desired to repair the pump, or the liner L, or to replace the latter with a fresh liner, the union G is removed from the section D, withdrawing the flange p from the lower end of the portion of the liner, and the entire liner is withdrawn from the section D. The elastic or flexible or resilient nature of the material component of the liner L permits the same to sway or bend or buclle slightly laterally, within the section D, thus providing for true alinement axially of the liner and the plunger member I-I, so that the same shall have proper true working fit, as in compensation for faulty alinement as among several sections of the pump tubing. It is found in practice that such faulty alinement often results from uniting a long string of pump tubing sections, and unless the same is corrected the plunger member will not have a true opera-tive fit within the pump barrel, resulting in leakage or in seizure of the plunger member within the barrel or lining or liner thereof.

TWe have found in practice that after the liner assumes its proper posit-ion within the pump barrel, such as the tubular Section D, so that the plunger member has a proper working fit and eld of reciprocation, the sand and gravel and similar other comminuted materials elevated within the pump in the action thereof, descend over the free upper edge of the liner into the annular space Z between the same and the barrel or section D, and eventually and effectively pack tho liner so as to hold it rigidly and positively in correct position for proper working conditions.

It will. be seen from the above statement of construction and observations as to operation, that a well pump organized in accordance with the invention is capable of convenient assemblage installation, repair, and replacement, and because of the peculiar features of construction, formation and arrangement, tends to conserve the working conditions which render the operation of the pump highly positive and eflicient, corrective of adverse working conditions heretofore prevalent.

We do not desire to be understood as limiting ourselves to the specific provision, construction, formation, combination, association and relative arrangement of parts, members and features shown and described; but reserve the right to vary the same, in adapting the improvements to varying conditions of use, without departing from the spirit of our invention and the terms of the following claims.

Having thus described our invention we claim and desire to secure by Letters Patent:-

1. In a well pump, a barrel, a shell therein and spaced therefrom throughout the major portion thereof, and means for detachably holding the shell within the barrel; said means comprising a union provided with an internal flange engaged with the lower end portion of the shell when the union is connected with the lower end portion of the barrel; said shell being provided with an external flange disposed between the fiange of the union and the lower end portion of the barrel.

2. In a well pump, a barrel, a shell therein and spaced therefrom throughout the major portion thereof, and means for detachably holding the shell within the barrel; said means comprising a union provided with an internal flange engaged with the lower end portion of the shell when the union is connected with the lower end portion of the barrel; said shell being provided with an external flange disposed between the fla-nge of the union and the lower end portion of the barrel, and the lower end portion of the shell above the flange thereon being of outwardly flaring formation.

3. In a well pump, a barrel, a liner therein and separated therefrom by an annular space surrounding the major portion thereof, the lower end portion of the liner being outwardly flared and being provided with a terminal external flange formed to engage with the lower end portion of the barrel, and with an annular concentric outer surface portion directly above said flange and formed for superficial engagement with the lower inner surface portion of the barrel; and holding means for the liner, said holding means acting upon the lower end portion of the liner.

In testimony whereof, we have signed our names to this .specification 1n the presence of rtwo subscribing witnesses.

CHARLES O. SPRAGUE. FRANK E. SPRAGUE. Witnesses 2 RAYMOND L. BLAKESLEE, CAL. F. HUNTER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

